航空学报 > 2016, Vol. 37 Issue (11): 3351-3360   doi: 10.7527/S1000-6893.2016.0008

机翼对螺旋桨发动机旋转颤振的影响研究

陈兆林, 杨智春, 谷迎松   

  1. 西北工业大学 航空学院, 西安 710072
  • 收稿日期:2015-12-11 修回日期:2016-01-05 出版日期:2016-11-15 发布日期:2016-01-22
  • 通讯作者: 杨智春,男,博士,教授,博士生导师。主要研究方向:气动弹性力学、结构动力学和结构健康监测。Tel.:029-88460461,E-mail:yangzc@nwpu.edu.cn E-mail:yangzc@nwpu.edu.cn
  • 作者简介:陈兆林,男,博士研究生。主要研究方向:旋转颤振、壁板颤振和能量有限元。E-mail:eagle985@163.com;杨智春,男,博士,教授,博士生导师。主要研究方向:气动弹性力学、结构动力学和结构健康监测。Tel.:029-88460461,E-mail:yangzc@nwpu.edu.cn;谷迎松,男,博士,副教授,硕士生导师。主要研究方向:非线性气动弹性力学和气动伺服弹性力学。E-mail:guyingsong@nwpu.edu.cn
  • 基金资助:

    国家自然科学基金(11472216);高等学校学科创新引智计划(B07050)

Effect of wing on whirl flutter of propeller engine

CHEN Zhaolin, YANG Zhichun, GU Yingsong   

  1. School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China
  • Received:2015-12-11 Revised:2016-01-05 Online:2016-11-15 Published:2016-01-22
  • Supported by:

    National Natural Science Foundation of China (11472216); The "111" Project of China (B07050)

摘要:

为了研究机翼对螺旋桨发动机旋转颤振的影响规律,揭示其影响机理,通过片条理论计算螺旋桨气动载荷,在MSC.NASTRAN软件平台上进行二次开发,对不同结构参数的吊舱-螺旋桨系统和机翼-吊舱-螺旋桨系统进行了旋转颤振分析。研究表明,机翼结构的弹性会大幅降低发动机俯仰模态频率,而小幅降低发动机偏航模态频率,从而改变两模态频率之差,影响模态耦合的程度,进而改变旋转颤振速度。另外,当发动机的运动与机翼翼面的运动耦合紧密时,机翼翼面的气动载荷能够显著提高发动机的旋转颤振速度。

关键词: 旋转颤振, 影响机理, 模态耦合, 机翼, 螺旋桨

Abstract:

In order to investigate the effects of wing on whirl flutter of propeller engine and reveal the underlying mechanism, the whirl flutter speed of the nacelle-propeller system and the wing-nacelle-propeller system under different structure parameters is analyzed. The strip theory is applied to calculate the aerodynamic loading of the propeller, and a method developed from MSC. Nastran is used to accomplish whirl flutter analysis. The results indicate that, the elasticity of wing structure can significantly decrease the natural frequency of engine's pitch mode, and slightly decrease the natural frequency of engine's yaw mode. This could change the difference between the natural frequencies of both modes. The degree of coupling between engine's pitch mode and yaw mode would then be influenced to cause the change in whirl flutter speed. In the case of tight coupling between the motion of the engine and the wing surface, the aerodynamic loading of the wing surface can significantly increase the whirl flutter speed of the engine.

Key words: whirl flutter, effect mechanism, mode coupling, wing, propeller

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